a=0.0000.0125(1984个零),b=0.0000000.08(1988个零),求a+b,a-b,a*b
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a=0.0000.0125(1984个零),b=0.0000000.08(1988个零),求a+b,a-b,a*b
a=0.0000.0125(1984个零),b=0.0000000.08(1988个零),求a+b,a-b,a*b
a=0.0000.0125(1984个零),b=0.0000000.08(1988个零),求a+b,a-b,a*b
应该是小数点后有1984个0吧?
a+b=0.0000.012508(1984个零)
a-b=0.0000.012492(1984个零)
a*b=0.0000.01(3973个零)
a+b=0.0000001250008(1984个零)
a-b=0.00000001249992(1984个零)
a*b=0.00000001(3982个零)
分析,
a=0.0000.......0125(1984个零)
=1.25×10^(-1984)
b=0.0000000......08(1988个零)
=8×10^(-1988)
因此,
a+b
=1.2508×10^(-1984),
a-b
=1.2492×10^(-1984),
a*b
=10^(-3971)。
a=0.0000.......0125=1.25x10^-1985
b=0.0000000......08=8x10^-1989
a+b=1.25x10^-1985+8x10^-1989=1.250008x10^-1985
a-b=1.25x10^-1985 -8x10^-1989=1.249992x10^-1985
a*b=1.25x10^-1985*8x10^-1989=1x10^-3973
那a/b=?
a=0.0000.0125(1984个零),b=0.0000000.08(1988个零),求a/b
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